Improvement in india-rubber fabrics



UNITED STATES E. E. MARGY, OF NEW YORK, Y.

IMPROVEMENT IN INDIA-RUBBER FABRICS.

Specification forming part of Letters Patent No. 26,359. dated December6, 1859.

To all whom it may concern:

Be it known that I, E. E. MARGY, of the city of New York, in the Stateof New York, have invented a new and improved fabric or compound ofindia-rubber which will cause it to retain permanent elasticity andwithstand changes of temperature and emit-no unpleasant odor; and Ideclare that the following is a true description of the same.

The nature of my invention consists in producing a new fabric by thecombinationof sulphuret of lead and carbonate of lead with india-rubberor caoutchouc and submitting the compound thus formed to the action ofheat. I combine these articles with india-rubber'in the followingproportions, which are the best known to me, although they may be variedwith good results.

To two parts of rubber I add one part of sulphuret of lead and one partof carbonate of lead, by weight, and mix or unite the compound bypassing the same through the heated rollers or grinders now generallyused in preparing and manufacturing india-rubber. After the mixture isthoroughly combined by grinding it may be spread upon cloth or rolledinto sheets, or put into any other required form for use. It shall thenbe subjected to the action of steam or water at a high temperature bybeing placed in a vessel containing steam at a heat from 240 to 350Fahrenheit, or containing water, or containing water and steam at thesame high temperature.

It may be necessary for the thorough ourin g of some articles, toincrease the temperatura to 400 and upward but the degree of temperatureand the length of time that the compound must be submitted to the heatwill depend to a certain extent upon the size and quality of the fabric;but the heat will in no case be carried so high as to liberate sulphurfrom the sulphuret of lead.

The application of heat by means of steam Q or hot water may be made byany of the wellknown processes in the manufacture of indiarubber, andmust be made by such means as the compound will not cure satisfactorilyin dry air.

French chalk or paris-white may be added to the compound for the purposeof increasing the bulk of the compound, and plaster-of-paris for thepurpose of hardening it may be added in small quantities.

Other ingredients may also be added for the purpose of coloring thefabric or giving it peculiar properties, as is well known to indiarubbermanufacturers but such articles have no effect in producing the result Ihave described.

I have sometimes dispensed with the carbon- .quantity of protoxide oflead or litharge and chalk, with the addition of some of the abovenamedsubstances, for the purpose of giving body and color to the fabric witha good result.

I do not claim the process of Charles Goodyear as set forth in hisoriginal patent of June 14, 1844, and reissued December 25, 1849; northe curing of india-rubber as set forth inpatent of S. Monlton, August,1847, (English 5) but What I do claim as my invention, and desire tosecure by Letters Patent, is-

The improved india-rubber fabric made by the combination of india-rubberwith sulphate of lead and carbonate of lead or the protoxide of lead,and by the exposure of said compound to steam or water at thetemperature herein-. before stated,substantially as described,withoutany admixture of free sulphur.

E. E. MAROY.

Witnesses:

W. J A. FULLER, JOHN A. SooNErA.

